Decorative bags/Piping coneI've used the plastic disposable decorative bags
Instructions
To make Cupcakes:
In a large bowl whisk together butter & condensed milk.
Next add milk, sugar, vanilla extract, vinegar & sour-cream & whisk again
Sift all the dry ingredients together. Now add some flour at a time & whisk. Continue doing this till you have mixed all the flour & you have a lump free batter.
Preheat oven to 350F. Line your cupcake pan with liners. Pour a spoonful or two of the batter into the liners so that its ¾ full. Don't fill till the top as the cupcakes will rise.
Bake in pre-heated oven for 10-15 mins or till completely done.
At 12 minutes mark, Insert a toothpick at the center of a cupcake, if it comes out clean that means our cupcakes are done. Transfer them on to a cooling rack & allow to cool completely.
To make Cream Cheese Frosting:
In a bowl combine the cheese & butter till soft & fluffy.
Then add the sugar, one cup at a time & keep stirring till all is well combined.
When you are finished adding the sugar add the vanilla extract & mix. That's it our cream cheese frosting is ready.
Transfer the frosting into the decorative/piping bag & using a circular motion of your hand starting with the outside & moving inside & upwards create a cone line shape on the cupcake using the frosting.
Decorate with some colored sprinkles if you like.
Notes
Ideally don't use butter & cream cheese that is at room temperature as that will make this frosting running.
If you still end up having a liquidy frosting, refrigerate the frosting for an hour or two to get the perfect consistency frosting. Or alternately add more sugar if it suits your taste.
Frost only once your cupcakes have cooled down completely else it will cause the frosting to melt.
You can store the cupcake in airtight container in the refrigerator for 2-3 days. You can serve them straight from the refrigerator & they are still soft & fluffy.